Eh, it must have something to do with religion, there have been offensive shirts since the dawn of metal. You're right, of course, that its obscene and wearing it would show a lack of foresight in regards to who you might run into, but I imagine the "Jesus is a Cunt" part caused an extra burst of outrage. I wouldn't wear it, but I'd like to own one, even if I'd have to hide it from my kid in the closet. 
I can't remember where this verse is from, I think it got removed from canon:
"I don't hang around with mostly men because I'm gay. It's because men are better than women. Better trained, better equipped...better. Just better! I'm not gay."
For context, this is the previous verse:
"Hi Jesus" -robvalue
"I don't hang around with mostly men because I'm gay. It's because men are better than women. Better trained, better equipped...better. Just better! I'm not gay."
For context, this is the previous verse:
"Hi Jesus" -robvalue
